| Co-Investigator(Kenkyū-buntansha) |
YAMADA Tetsuo Kitami Institute of Technology, Department of Applied Chemistry, Associate Professor, 工学部, 助教授 (40091558)
KEKIGUCHI Kazuhiko Saitama University, Graduate School of Science & Engineering, Research assistant, 大学院・理工学研究科, 助手 (50312921)
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| Budget Amount *help |
¥13,200,000 (Direct Cost: ¥13,200,000)
Fiscal Year 2005: ¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2004: ¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 2003: ¥6,000,000 (Direct Cost: ¥6,000,000)
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| Research Abstract |
Recently, energy demanded has increased with significantly development of economy in China. Respond to this tendency, China has proposed increment of coal and natural gas production and oil import. The high emission of CO_2 (carbon dioxide, a greenhouse gas) with increasing consumption of a large amount of fossil fuels is critical issue. Moreover, waste coal which is discarded coal when coal extraction and cleaning, because of having high-ash content, high-sulfur content and low-calorific value is discarded since the scarce availability, occupancy of vast area of land and air pollution by autogenous ignition and water pollution, an appropriate treatment and effective utilizing technology of waste coal is required. Therefore, China has paid the attention to efficient use of waste coal and energy recovery as a new energy. The purposes and objectives of this study are the efficient use of waste coal. We made waste coal-biomass briquette as solid fuel and conducted basic research on the co
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mbustion test and gasification technology. As the result, it was suggested that waste coal-biomass briquette had compression strength exceeding standard of internal transport in China, calorific value exceeding civilian use in China, good burning quality and reduction of sulfur oxide. In addition, it was implied that dissemination of waste coal-biomass briquette as a solid fuel was possible because the lower cost of waste coal-biomass briquette than the routine coal-biomass briquette. And as basic research about gasification technology of waste coal-biomass briquette, it was suggested that reactivity of gasification was progressive, hydrogen sulfide was fixed, and calorific value of gas fuel produced was increased in comparison with gasification of its original waste coal. We thought that these effects came from addition of biomass which may cause the increment of carbon content and high surface area and catalytic metals such as K, Na and Ca contained in biomass and calcium hydroxide which is as a sulfur-fixation agent. In addition, it was found that the reactivity of gasification was improved by the suitable increasing briquetting pressure when waste coal-biomass briquette was prepared. These basic researches implied that possibility of converting waste coal-biomass briquette to clean gas fuel by gasification. These study results indicate the possibility of the application of waste coal-biomass briquette as an energy resource of the solid fuel or the gas fuel, and may lead to the recovery energy and effective utilization technology of waste coal. Less
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